i was filing GST Returns for a client. He made an amendment that upto OCT-DEC in composition again he changed as Regular Scheme. its getting regular scheme from october onwards. oct-dec GSTR4 Filed. now should i file OCTOBER for GSTR3B, GSTR1? because in the software it was open to file. Please clarify this. I tried to file october GSTR 3B and getting error code RT-CWRS-9018 . please explain me. Thanks Bala